Color photography.



I. KITsEE.

COLOR PHOTOGRAP APPLICATION FILED SEPT. 22, 1916. IIE I:A

FEB. 5, |919. 1,298,514. Patented Mur. 25,1919.

Z mka colored (if green and UNITED A sTATEs PATENT oEEIcE.

IsIDoit KITsEEz or PHILADELPHIA, PENNSYLVANIA Specification of LettersIvatent. y

coton PHOTOGRAPHY.

Patented Mar. 25, i919,v

Appiicariuanied september 22, 1916,'seria1No. 121,614. nenewearetrary 5,1919. serial No. 275,196.

TaaZTwMm t may concern:

. Be it known that I, IsIDoR zen of the .United States, residing atPhiladelphia, in the county o Philadelphia and State of Pennsylvania,have invented certain new and useful Improvements in ColorPhotography/)of which the following is a specification.

My invention relates to an improvement in color photography.

My invention may be practised with single blanks as well as with movingpicture films and its object is to 4produce plates or films with thephotographic images in their required color.

I will describe my invention as being pracp tised on a moving picturefilm with the aid of a two color scheme, and I take it for granted thattwo negatives are produced of one and the same object, one negativethrough a green and 1 a second negative through a red filter, and thatthese negatives are properly developed.

To be able to print from these negatives a positive at one operation Iproceed in the following manner v A support, here a celluloid film, issensitized on both sides with an emulsion of cromated gelatin film.

The gelatin emulsion for one'surface is red is the color scheine) reenand the gelatin for the second surface is colored red. 'Io print thesetwo negatives on the sensitized film,

Aet

one ofthe negatives say the one with the greencoloi' value, is placed onthat surface of the sensitized lni which is dyed red and V-by the lightis provided-with a red filter or screen. The second of the negatives,here the negative with the red vcolor value, 1s-

placed on the other vor green surface o f the sensitized film and thelight raysare provided with'a green filter or screen.

After the printing process is completed, the sensitized film is'washedin the usual manner, whereby thegelatin, not acted upon thelight, is washed away.v I will statehere that in such process, thegelatin remaining on the lm will retain its color, as I .have found thatno matter how well the film has to be washed, the`dye does not leave thegelatin acted upon by thelight. To' illustrate some forms my inventionmay take I have reference to the accom-v panying drawing In thisdrawing:A Figure 1 'is a diagram- KITSEE, a citiis the film asillustratedin Fig. 3

with the aid 0f.

matic view of an object supposingly to be moving and illustrating thesame in three positions. Fig. 2 is a negative of these objects takenthrough a red filter or screen. Fig. 3 is a negative taken through agreen filter or screen of one and the' same object; Fig. 4 is adiagrammatic view with the lms in section of lmy improved method Jofphotographically printing froml two negativesv on one properlysensitized film. Fig. 5 is a sec- '7 the green', color i The films 4andl 6 are properly" sensitized and the photograph onthe lm of Fig. 2 istakenfthrough a red filterorscreen and the vphotograph on the lm of Fig.3 is taken through a green filter or screen. The two films are properlydeveloped and are then made the mediums for photographically printing ona lm sensitized on each surface with chromated gelatin.

' In Fig. 4, 4 is the film as shown in Fig. l2

with the red color value images 5 thereon, 6

with the 8 is the green color value images 7 thereon,

of chrolm, 9 and 10 are the two layers mated gelatin, 11 is a source ofli color screen or filter therefor, green filter, 13 the housing A is asecond source of light, 1 5 the color filter, here red, and 16 thehousing for the light. The chromated .gelatin 9 is here dyed green andthe chromated gelatin 10 is here dyed red, 17 and 18 are-means, such assprocket wheels to move all three films in unison.

In Fig. 5, 4 is one of the negatives "and 5 the' image thereon, 6 is thesecond negative and 7 the image thereon, 8 the ilmand 9 and 10 the twolayers of chromated" gela- .Y tin thereon, dyed, as said above, onegreen and one red.

the beginning of the specification: v The' two negatives, one through ared one through a green filter are preferably taken simultaneously..either each through a different' lens or' through one flens with properarrangements, so as to produce an equal distribution of light for bothlms.

ht, i2 the;

for the light, 14 'p I am aware, that in practice the demarcation of thedifferent colors is not as sharp as illustrated here in this drawing,but as such condition does not aii'ect my invention, it is unnecessarylfor me to enlarge thereon, and it is well known that the condition ofthe negative, as to the density of the photographed parts, depends to agreat extent on the color density of the photographed object if a colorscreen is employed.

Having now described my lnventlon what I claim as new and desire tosecure by Letf ters Patent is l. In colorrphotography the method whichvconsists in first providing a Suitable support on both sides with filmsof colored chromated gelatin, the color of one of said films differingfrom the color of the second of said films and then 'printingsimultaneously on both of said films through color filters identicalwith the color of said films.

2. In color photography the improvement which consists in provdmgtwosides of a moving picture film with chromated gelatin, both of saidgelatins colored, but the color of one of said gelatins different fromthe color of the second of said gelatins and then simultaneouslyprinting from suitable photographs on each side of said film.

In testimony lwhereof I afx my signature in presence of two witnesses.

'IsrnoR KmsEE. Witnesses FRANCES RUTHERFoRD, ERNEST MILLER.

